Creando nuestra primera App Web con create-react-app (ReactJS)

En este tutorial, vamos a crear nuestro primer proyecto. Para ello, trabajaremos desde del terminal de Visual Studio Code (VSC). Aunque si no queréis instalar este IDE (cosa que os recomiendo encarecidamente), podéis utilizar la propia consola de Windows.

Cuando creamos un proyecto de React, y no disponemos de suficiente experiencia en esta tecnología nos puede suponer un terrible desafío debido a múltiples factores que actualmente se nos escapan debido a nuestra falta de conocimiento sobre esta tecnología. Algunos de estos factores pueden ser: ¿Qué dependencias necesitamos? ¿Qué configuración? etc.

Por todo ello, Facebook creó create-react-app, con la finalidad de abordar todos estos problemas ejecutando esta instrucción podemos crear un proyecto en tan solo un par de minutos.

Esta instrucción, nos auto generará una plantilla con una estructura ya predefinida idéntica para cualquier proyecto y sobre la que poder realizar nuestro proyecto. Por todo ello, es la forma más recomendable de inicializar un proyecto en ReactJS. Sin más preámbulos !Comenzamos¡

Abriendo un nuevo terminal en VSC

Si trabajamos desde el IDE VSC y queremos abrir un nuevo terminal vamos a Terminal > New Terminal o pulsamos la combinación de teclas CONTROL + SHIFT + Ñ

Situándonos en la ruta donde crearemos el proyecto

Y nos desplazamos hasta la ruta donde queramos crear nuestro proyecto en nuestro caso, vamos a crearlo sobre el escritorio. Por lo que vamos a esa ruta:

Creando el proyecto con create-react-app

Una vez situados en la ruta deseada, podemos crear un proyecto mediante el comando:

npx create-react-app my-app

Este comando creará el proyecto en la ruta seleccionada, instalará paquetes e inicializará el repositorio de git. El nombre de la aplicación en este caso es my-app aunque podría ser cualquier nombre que decidamos establecer.

Arrancando el proyecto

Si nos fijamos la propia instrucción que acabamos de ejecutar anteriormente nos da como sugerencia que cambiemos de directorio. Acabamos de crear el proyecto, pero no estamos situados sobre él. Para situarnos hacemos un cd my-app:

Si vamos a la ruta donde hemos creado el proyecto y abrimos el directorio my-app, podemos ver la estructura del proyecto que acabamos de crear con la instrucción anterior.

Una vez situados sobre el proyecto vamos a ejecutar la instrucción para inicializar/arrancar el proyecto para ello ejecutamos npm start:

Y una vez tenemos compilado satisfactoriamente el proyecto, se nos arrancará automáticamente en el navegador con la ruta del localhost. Tenemos la ruta localhost para local y en de nuestra red con una IP para que se puedan conectar los equipos que están dentro de nuestra red.

Y ya tenemos nuestro primer proyecto creado. La web oficial de ReactJS y a la que nos redirige el enlace de Learn React es:

Create-react-app con instrucciones consecutivas

Realmente, podemos concatenar las 3 instrucciones juntas para ejecutarlas consecutivamente. Un ejemplo sería:

npx create-react-app my-app
cd my-app
npm start

Lo copiamos y pegamos en el terminal y conforme se vayan acabando las instrucciones pulsamos ENTER.

Abriendo el proyecto

Bien, una vez hemos creado el proyecto podemos abrirlo o bien desde File>Open Folder o bien arrastrado la carpeta al VSC.

Y seleccionamos la carpeta raíz del proyecto (es nuestro caso, my-app).

Si ahora volvemos a abrir un nuevo terminal, directamente se nos sitúa sobre la carpeta raíz del proyecto.

Uno de los beneficios que nos ofrece el trabajar con los terminales de VSC frente a utilizar la línea de comandos de Windows es que podemos tener varios terminales abiertos simultáneamente en una misma pestaña y poder gestionarlos simplemente cambiando de pestaña.

Bueno, esto a sido todo por este artículo, hemos visto como crear nuestra primera aplicación con React y finalmente como abrir el proyecto con VSC. Nos vemos en las siguientes clases. ¡Un saludo Reacter@s!

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